Contrast Ratio: What does it mean?
Actually what does contrast ratio mean? Nowadays many monitors boast a contrast ration of millions to one, while my 5-year-old 30" Cinema HD Display has a contrast ratio of 700:1. In practice, what difference does it make?
Contrast ratio is how many times brighter a white area is than a black area on the screen. 700:1 is good. Many companies advertise dynamic contrast. That is the ratio of white brightness with the brightness control at maximum, to black with the brightness control at minimum. This gives a much larger number than the real contrast ratio, but it is a meaningless number.
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What does it mean to compress a file?
does it mean it will take up less room on my disk and is there anything bad that can happen by compressing a file?
jaimiem wrote:
what does it mean to compress a file?
You're talking about lossless compression. See
<http://en.wikipedia.org/wiki/Data_compression#Lossless>
does it mean it will take up less room on my disk
It depends on the file.
An MP3 or JPEG file contains data which has already been subjected to lossy compression. Consequently, compressing such a file will save very little space on the disk. This saving usually comes from compressing metadata (such as MP3 tags or EXIF tags), which don't take much space to begin with. Under certain circumstances, such a compressed file may even be bigger than the original.
By contrast, text files can take considerable compression. An example is the MS Word .docx format. A .docx file is actually a (compressed) zip archive containing a hierarchy of mostly marked-up text files. Such an archive, when expanded, can take 10 times as much space.
is there anything bad that can happen by compressing a file?
"Anything" is rather a large word. The two chief issues you have to be aware of are password protection and compatibility. If the compressed file is password-protected and you lose the password, you may never again gain access to it. If a compression format becomes obsolete, you may no longer find the software able to expand the archive. -
HT3782 What does it mean "Battery Health" Check battery in the battery menu bar?
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What does this mean:Photoshop 13.1.2 for Creative Cloud Installation failed. Error Code: U44M1P7
What does this mean:Photoshop 13.1.2 for Creative Cloud Installation failed. Error Code: U44M1P7
I found the manual update, which worked!
http://www.adobe.com/support/downloads/thankyou.jsp?ftpID=5595&fileID= 5604Hi Barbara,
For failed 13.1.2 update error U44M1P7, Please refer to the solution mentioned in the following threads :
http://forums.adobe.com/message/5396792#5396792
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GetResponseCode() returns -1,what does it mean
Hi ,
The HttpURLConnection class's getResponseCode() method returns -1.
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Null object is returned.I think proxy is the culprit.If anyone can help me what -1 means,it will be really greatfull to diagnoise my issue in detail and solve my problem soon.
Your help will be greatfull.
Thanks
prakashAs it says perfectly clearly, right there in the API documentation for the method:
"Returns -1 if no code can be discerned from the response (i.e., the response is not valid HTTP)." -
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http://support.apple.com/kb/HT4367 -
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You type way faster than me Gene.
Well, not necessarily in this case.
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